Table 1.
Baseline patient characteristics.
| Variable | All patients (N = 656) | Pre pandemic (N = 379) | Post pandemic (N = 277) | P value (pre vs. post pandemic) |
|---|---|---|---|---|
| Age (years) | 69 (58—78) | 68 (58—78) | 70 (59—79) | 0.20 |
| Male, n (%) | 477 (73.5) | 271 (72.1) | 206 (75.5) | 0.34 |
| Body mass index (kg/m2) | 24.1 (22.1—27.2) | 24.1 (22.1—26.9) | 24.2 (22.1—27.4) | 0.26 |
| Medical history | ||||
| Diabetes, n (%) | 198 (30.1) | 114 (30.1) | 84 (30.4) | 0.92 |
| Hypertension, n (%) | 464 (70.7) | 264 (69.7) | 200 (72.2) | 0.48 |
| Hyperlipidemia, n (%) | 430 (65.7) | 247 (65.2) | 183 (66.3) | 0.76 |
| Chief complaint | ||||
| Chest pain, n (%) | 568 (86.6) | 329 (86.8) | 239 (86.3) | 0.85 |
| Dyspnoea, n (%) | 35 (5.3) | 18 (4.8) | 17 (6.1) | 0.44 |
| Killip classification | 0.110 | |||
| Class Ι, n (%) | 484 (82.0) | 286 (85.4) | 198 (77.7) | |
| Class II, n (%) | 64 (10.8) | 29 (8.7) | 35 (13.7) | |
| Class III, n (%) | 20 (3.4) | 9 (2.7) | 11 (4.3) | |
| Class IV, n (%) | 22 (3.7) | 11 (3.3) | 11 (4.3) | |
| SBP (mmHg) | 140 (120–160) | 141 (120–160) | 140 (119–159) | 0.53 |
| HR (beats/min) | 73 (60–86) | 72 (60–84) | 76 (61–89) | 0.061 |
| Laboratory findings | ||||
| Haemoglobin (g/dL) | 14.4 (12.8—15.6) | 14.4 (12.6—15.6) | 14.4 (12.9—15.6) | 0.85 |
| Serum creatinine (mg/dL) | 0.89 (0.76—1.08) | 0.87 (0.74—1.04) | 0.90 (0.79—1.12) | 0.021 |
| Maximum CPK (U/L) | 845 (160–2567) | 757 (134–2320) | 1011 (197–2819) | 0.069 |
| Maximum CK-MB (U/L) | 72.2 (11.0–244.0) | 60.0 (11.0–231.7) | 83.2 (12.9–268.9) | 0.28 |
| ST-segment elevation, n (%) | 490 (75.0) | 275 (72.6) | 219 (78.5) | 0.085 |
| Time from EMS call to hospital (min) | 30 (25—37) | 29 (25—36) | 32 (26—39) | 0.008 |
Continuous variables are presented as mean ± standard deviation if normally distributed, and median (interquartile range) if not normally distributed. Categorial variables are presented as number of patients (%).
CK-MB creatine kinase and its MB isoenzyme, CPK creatine phosphokinase, EMS emergency medical services, HR heart rate, SBP systolic blood pressure.